Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/32—Material containing basic nitrogen containing amide groups leather skins
  • D06P3/3206—Material containing basic nitrogen containing amide groups leather skins using acid dyes
  • D06P3/3226—Material containing basic nitrogen containing amide groups leather skins using acid dyes dis-polyazo
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
  • C09B35/50—Tetrazo dyes
  • C09B35/56—Tetrazo dyes of the type

Definitions

• R 1 h or SO 3 H
• Z 1 , z 2 an optionally substituted amino group
• n 1 or 2
• n+ m being ⁇ 3 and wherein the rings A and B may have further substituents, for example, alkoxy groups such as methoxy groups.
• substituents R there may be mentioned in particular: optionally substituted alkyl groups, in particular such with 1-4 C atoms, halogen, in particular chlorine.
• n-substituents R can be the same or different. This likewise applies to the substituents R 1 and Z 1 -Z 2 .
• substituents Z 1 -Z 2 there may be mentioned in particular amino groups as well as aminoalkylamino groups such as C 1 -C 4 alkyl groups, optionally substituted by hydroxyl, sulphonic acid or caboxylic acid groups.
• R' h, ch 3 , cl.
• n 1 or 2
• n 1 or 2
• n+ m being ⁇ 3.
• Suitable coupling components (V) are 2-amino-8-hydroxynaphthalene-6-sulphonic acid and 2-amino-8-hydroxynaphthalene-3,6-disulphonic acid or mixtures of both.
• Suitable coupling components (VII) are for example: 1,3-diaminobenzene-4-sulphonic acid, 1-methyl-2,6-diaminobenzene-4-sulphonic acid, 1-chloro-2,6,-diaminobenzene-4-sulphonic acid, 1-amino-3-hydroxy-ethylamino-benzene-6-sulphonic acid, 1-methyl-2-hydroxyethylaminobenzene-4-sulphonic acid, 1-methyl-2-carboxy-methylamino-6-aminobenzene-4-sulphonic acid, 1-methyl-2-sulpho-methylamino-6-aminobenzene-4-sulphonic acid, 1-chloro-2-carboxy-methylamino-6-aminobenzene-sulphonic acid, 1-chloro-2-sulphomethyl-amino-6-aminobenzene-4-sulphonic acid, 1-chloro-2-hydroxymethylamino-6-aminobenzene-4-s
• the new dyestuffs are suitable for the dyeing and printing of natural fibre materials, especially leather. Black dyeings are obtained on leather with good fastness properties.
• 28 g of 4,4'-diamino-diphenylamine-2'-sulphonic acid are tetrazotised in a known manner and coupled in an alkaline medium onto 48 g of 2-amino-8-hydroxy-6-sulphonic acid.
• the resulting diamino-disazo dyestuff is further tetrazotised and coupled in an alkaline medium with 39 g of 1,3-diaminobenzene-4-sulphonic acid.
• the dyestuff precipitated by the addition of sodium chloride and then isolated is easily soluble in water and dyes leather black. The dyeings possess good fastness properties.
• 28 g of 4,4'-diamino-diphenylamine-2'-sulphonic acid are tetrazotised in a known manner and coupled in an alkaline medium onto 64 g of 2-amino-8-hydroxynaphthalene-3,6-disulphonic acid.
• the resulting diaminodisazo dyestuff is further tetrazotised and coupled onto 39 g of 1,3-diaminobenzene-4-sulphonic acid.
• the dyestuff precipitated by the addition of sodium chloride and then isolated is easily soluble in water and dyes leather black.
• Unsymmetrically synthesised dyestuffs which are likewise suitable for dyeing leather, are obtained, if during the end coupling stage half of the amount each of for example 1-chloro-2,6-diaminobenzene-4-sulphonic acid and 1,3-diaminobenzene-4-sulphonic acid or another suitable component is used.
• the end components (total of 2 mol) required for the end coupling can also of course be used in any other molar ratio.
• 28 g of 4,4'-diamino-diphenylamine-2-sulphonic acid are tetrazotised in a known manner and coupled in an alkaline medium one after the other or simultaneously with 24 g of 2-amino-8-hydroxynaphthalene-6-sulphonic acid and 32 g of 2-amino-8-hydroxynaphthalene-3,6-disulphonic acid.
• the resulting unsymmetrical diamino-disazo dyestuff is further tetrazotised and coupled in an alkaline medium with 42 g of 1-methyl-2,4-diamino-benzene-5-sulphonic acid. After precipitation by the addition of sodium chloride and isolation the black dye is easily soluble in water and particularly suitable for dyeing leather.
• black dyestuffs are also produced having good solubility and particularly good suitability for dyeing leather.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Coloring (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=5816795

Family Applications (1)

Country Status (11)

Cited By (1)

Families Citing this family (1)

Citations (5)

• 1971
  • 1971-08-14 DE DE2140867A patent/DE2140867C3/de not_active Expired
• 1972
  • 1972-08-11 BE BE787481D patent/BE787481A/xx unknown
  • 1972-08-11 JP JP47080036A patent/JPS4828035A/ja active Pending
  • 1972-08-11 FR FR7229019A patent/FR2149418B1/fr not_active Expired
  • 1972-08-11 CH CH1194772A patent/CH574480A5/xx not_active IP Right Cessation
  • 1972-08-11 DD DD165015A patent/DD100486A5/xx unknown
  • 1972-08-12 ES ES405806A patent/ES405806A1/es not_active Expired
  • 1972-08-12 IT IT28197/72A patent/IT968368B/it active
  • 1972-08-14 NL NL7211085A patent/NL7211085A/xx not_active Application Discontinuation
  • 1972-08-14 US US05/280,146 patent/US4033946A/en not_active Expired - Lifetime
  • 1972-08-14 GB GB3782772A patent/GB1348217A/en not_active Expired

Patent Citations (5)

Non-Patent Citations (1)

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